A problem with the touchscreen of the Apple iPhone 6, which many users have complained about on discussion boards, is becoming “incredibly common,” according to repair techs.

The most visible sign that something has gone awry: a flickering grey bar at the top of the screen.

Apple, according to participants on Apple forums, doesn’t recognize the issue and simply advises people to buy a new phone and trade in the malfunctioning device.

A blog post at ifixit.org this week examined the problem, which has been brought to the attention of an array of repair shops around the United States.

A peek at Apple discussion forums indicates that the problem cropped up around April of 2015 and complaints about the issue have continued to the present.

Walmark, a Bay Area resident, reported his experience with this malfunction in March of this year.

He visited the Apple store at Westfield Mall in San Jose to see if employees at the retail outlook could remedy his touchscreen difficulties.

After waiting about two hours, Walmark said he met with a store representative.

“He acknowledged the problem. He was very familiar with it, but said Apple doesn’t recognize it as an issue, and so there is not much he can do,” Walmart reported. “I can either replace my phone with identical one for $329 or I can get a $350 trade in on it if I want to upgrade. No offer of free replacement, no consolation, nothing. I left.”

Some time later, Walmark went to an Apple store in Los Gatos.

“The funniest thing is that at this point I was sitting next to a guy who had another iPhone 6 Plus with flickering lines on the screen,” he wrote.

In May 2015, an iPhone user posted about similar problems with his phone.

“So a couple days ago, my iPhone 6+ began having intermittent screen responsiveness,” Benm1972 posted. “First time, I received a phone call and couldn’t answer it because the swipe wouldn’t work. I turned it off and back on with no luck. I reset it and that fixed it. That was the only issue that day. I the last few days it’s becoming more frequent. Today alone I’ve had to reset it eight times.”

Some iPhone users, who are threatening to switch to other platforms after years of loyalty to the Cupertino-based tec giant, have even coined a phrase for the problem.

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